在信息安全管理中，数字签名主要用于确保数据的（ ）。
- A.完整性
- B.保密性
- C.可用性
- D.可靠性
正确答案及解析
正确答案
解析
本题考查的是信息系统安全属性中的完整性。
保障应用系统完整性的主要方法如下：
（1）协议：通过各种安全协议可以有效地检测出被复制的信息、被删除的字段、失效的字段和被修改的字段。
（2）纠错编码方法：由此完成检错和纠错功能。最简单和常用的纠错编码方法是奇偶校验法。
（3）密码校验和方法：它是抗篡改和传输失败的重要手段。
（4）数字签名：保障信息的真实性。
（5）公证：请求系统管理或中介机构证明信息的真实性。
信息系统安全属性必须掌握，易出选择题。
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